export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'undefined' || time === null || time === 'null') {
    return ''
  } else if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

export function parseTime2(time) {
  if (time) {
    var date = new Date(time)
    var year = date.getFullYear()
    /* 在日期格式中，月份是从0开始的，因此要加1
      * 使用三元表达式在小于10的前面加0，以达到格式统一  如 09:11:05
      * */
    var month = date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1
    var day = date.getDate() < 10 ? '0' + date.getDate() : date.getDate()
    var hours = date.getHours() < 10 ? '0' + date.getHours() : date.getHours()
    var minutes = date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes()
    var seconds = date.getSeconds() < 10 ? '0' + date.getSeconds() : date.getSeconds()
    // 拼接
    return year + '-' + month + '-' + day +
      ' ' + hours + ':' + minutes + ':' + seconds
  } else {
    return ''
  }
}

export function getMousePosition(event) {
  var x = 0
  var y = 0
  var doc = document.documentElement
  var body = document.body
  if (!event) event = window.event
  if (window.pageYoffset) { // pageYoffset是Netscape特有
    x = window.pageXOffset
    y = window.pageYOffset
  } else {
    x = (doc && doc.scrollLeft || body && body.scrollLeft || 0) -
      (doc && doc.clientLeft || body && body.clientLeft || 0)
    y = (doc && doc.scrollTop || body && body.scrollTop || 0) -
      (doc && doc.clientTop || body && body.clientTop || 0)
  }
  x += event.clientX
  y += event.clientY - 50
  return { 'x': x, 'y': y }
}
